Lookup for commands in kmod_module_new_from_lookup()

Install and remove commands are now properly treated on lookup. Example
config file:

$ ./test/test-lookup installme
libkmod version 1
Alias: 'installme'
Modules matching:
	installme
		install commands: 'echo "this is a install message"'

$ ./test/test-lookup removeme
libkmod version 1
Alias: 'removeme'
Modules matching:
	removeme
		remove commands: 'echo "this is a remove message"'
4 files changed